OpeningYour 2J collet chuck starts as raw bar stock and ends as a verified, drop-in toolholder. We machine it to your drawing, not a catalog standard. Every critical dimension is checked on a CMM befo
Your 2J collet chuck starts as raw bar stock and ends as a verified, drop-in toolholder. We machine it to your drawing, not a catalog standard. Every critical dimension is checked on a CMM before the part leaves our floor.
At a glance: Tolerance ±0.005 mm on bore and taper, surface finish Ra 0.4, lead time 7-12 days, no MOQ.
We have run 2J collet chucks for Swiss lathes, CNC turning centers, and live tooling turrets for over 20 years. If you need a custom thread pitch, a modified taper angle, or a special pull-back design, we build it.
| Parameter | Value |
|---|---|
| Material options | 8620 steel (case-hardened), 4140 pre-hardened, 12L14 for high-speed, 303/304 stainless |
| Hardness | 58-62 HRC (case depth 0.8-1.2 mm) or 28-32 HRC core |
| Taper accuracy | 2J taper ground to ±0.005 mm, concentricity ≤0.008 mm TIR |
| Bore tolerance | H6 or tighter per your drawing |
| Surface finish | Ra 0.4 on taper and bore, Ra 0.8 on body |
| Machines used | 5-axis CNC lathes, cylindrical grinders, jig grinders |
| Inspection | CMM full report, air gauge for taper contact |
| Batch size | 1 piece to 5,000 pieces, no MOQ |
| Lead time | 7 days for prototypes, 12 days for production runs |
| Country of origin | Made in China, Dongguan factory |
We grind the 2J taper in-house. We do not outsource the critical geometry. This keeps the runout consistent from the first piece to the last.
1. Batch-traceable quality. Each heat of steel gets a unique lot number. We record the material cert, machining parameters, and inspection results for that lot. If you have a problem six months later, we can trace it back to the exact shift and operator.
2. Inspection report per batch. You get a dimensional report with every shipment. It lists all critical features: taper angle, bore diameter, concentricity, and hardness. No generic "certificate of conformance." You see the actual measured values.
3. One factory for CNC + stamping + springs + heat sinks. Your collet chuck is not an isolated part. If your assembly also needs a spring collet, a stamped retainer, or a heat sink for the spindle drive, we make all of it under one roof. Fewer suppliers, fewer logistics headaches, one accountable partner.
Custom CNC collet chucks are not shelf items. Our customers use them in:
In every case, the chuck is machined to match the specific spindle nose and the specific workpiece. That is why we never stock "universal" chucks.
Q: What is your MOQ? A: No MOQ. We make one piece for a prototype or 5,000 pieces for production. The per-piece price drops with quantity, but we do not force you to buy more than you need.
Q: How do you guarantee tolerance and quality? A: We grind the taper and bore on dedicated cylindrical grinders. Each chuck is inspected on a CMM and an air gauge for taper contact. We send you the inspection report with the shipment. If a part is out of spec, we replace it at no cost.
Q: What is your lead time for a custom 2J collet chuck? A: 7 days for a prototype or a single piece. 10-12 days for production batches. If you need it faster, tell us—we can split the batch and ship partial quantities.
Q: Can you provide material certificates and heat treatment reports? A: Yes. Every batch comes with a mill certificate for the raw material and a heat treatment report showing hardness and case depth. We also provide a RoHS or REACH declaration if required.
Send us your 2J collet chuck drawing. We will review the geometry, suggest a material if you are unsure, and send you a firm quote within 12 hours.
Email: sc@bquq.com WhatsApp: +86 13713157787
No MOQ, no minimum order quantity, no waiting. Just a precise, verified part made in China.
| Parameter | Capability |
|---|---|
| Materials | AL6061/7075, SUS303/304/316, 45# steel, T2 copper, H59 brass, POM, PEEK, nylon |
| Tolerance | ±0.005mm standard, ±0.003mm on request |
| Machines | 3/4/5-axis CNC, turn-mill, Swiss lathe |
| Surface | Anodizing, nickel, zinc, passivation, sandblast, polish |
| Size Range | Max 400 x 300 x 200 mm |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Full report per batch, CMM data on request |
